The Relay Contacts (Option) - Siemens AT18 Operating Instructions Manual

Operating Manual - Elevator Door Operation AT18

9 The Relay Contacts (Option)

The relay contacts are situated on the relay module (option) and can be utilised to report the
following door statuses to the elevator control of a higher order:
– X11
The door has reached the "CLOSE" position. The relay switches on when the controls recognised
the "CLOSE" position and the pulse generator gives no impulse any more, in other words the door
stands still. Pin 3 is then connected to Pin 1 until the "DOOR OPEN" instruction is given. The relay
then drops again immediately and Pin 3 is connected to Pin  again.
– X12
The door reverses.
The relay switches on when the door reverses due to a blockage, a light barrier interruption or
an opening instruction for example. Pin 1 is then connected to Pin 3 until the "OPEN" position is
reached.
– X13
The door has reached the "OPEN" position. The relay switches on when the current distance of the
door to the "OPEN" position is less than  cm. Pin 1 and Pin 3 are then connected.
If the distance of  cm is exceeded again the relay drops immediately and Pin 3 is connected to Pin
2 again.
In the "Overview of the Operating Elements" the contacts are always presented in the (inactive)
status of the relay without power. In addition the active status is displayed with an LED on the
switching relay.
WARNING
The door control unit is not a safety mechanism. The relay contacts may therefore not be used for
the safety circuit of the elevator.
When the housing lid is opened only low safety voltage (voltage lower than 4V) may be present.
At a connection of higher voltage (maximum 30V AC) to the relay module the protective cover
provided for it must be used. Thereby the following has to be observed:
Connected wires must be suitable for the voltage in use and have an appropriate insulation (double
or reinforced insulation). Recommended are cables with a circumference of 6mm to 7mm. Inside
the cover the single-insulated single wires must be removed a minimum of 5mm from the cable end
and be connected as short as possible to the clip plugs X11 ("CLOSE" signal) and
X13 ("OPEN" signal).
The wires must be secured inside the plastic cover against pulling out. A cable tie, which has been
pulled tightly around the cable, prevents the cable from being pulled through the oval opening
of the relay cover (see photo ). The cable tie must be applied in such a way that a minimum of
5mm of the outer cable jacket is inside the protective cover. Components of the controls and the
connecting cable, such as the motor plug and its wires may only come in contact with the additional
(or reinforced) insulation of the current-carrying wires.
Currents from different networks (e.g. 4V and 30V) may NOT be connected to the relay module.
17